Answer: 1160mg Explanation: Molarity = number of moles ÷ volume According to the information in the question, molarity = 1.25 M, volume = 18.0 mL = 18/1000 = 0.018L M = n/V n = M × V n = 1.25 × 0.018 n = 0.0225moles. Using mole = mass/molar mass, to find the mass of lithium phosphide (Li3P) Molar mass of Li3P = 6.9(3) + 31 = 51.7g/mol mole = mass/molar mass 0.0225 = mass/51.7 mass = 1.16grams. In milligrams (mg), mass of Li3P = 1.16 × 1000 = 1160mg Log in to Reply
Answer:
1160mg
Explanation:
Molarity = number of moles ÷ volume
According to the information in the question, molarity = 1.25 M, volume = 18.0 mL = 18/1000 = 0.018L
M = n/V
n = M × V
n = 1.25 × 0.018
n = 0.0225moles.
Using mole = mass/molar mass, to find the mass of lithium phosphide (Li3P)
Molar mass of Li3P = 6.9(3) + 31 = 51.7g/mol
mole = mass/molar mass
0.0225 = mass/51.7
mass = 1.16grams.
In milligrams (mg), mass of Li3P = 1.16 × 1000 = 1160mg